Name: French Loaf Cake
Ingredients: 2 cups sugar; ½ cup butter; ½ cup sweet milk; 1 teaspoon baking soda; 2 teaspoons cream of tartar; 3 eggs; 3 cups flour; lemon flavoring to taste

Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

French Loaf Cake

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare the batter

Preheat the oven to 350°F (175°C).
Cream together the sugar and butter until light and fluffy.
Add the sweet milk, baking soda, and cream of tartar, mixing well.
Beat in the eggs one at a time until fully incorporated.
Gradually add the flour, mixing until smooth.
Flavor the batter with lemon to your taste.

Bake

Pour the batter into a greased loaf pan and bake for about 45-50 minutes or until a toothpick comes out clean.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

Butter + milktop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Butter + creamtop 8% of all pairs

Smell alikemoderate

Cooked together41,516 recipes

Shared aroma: delta-dodecalactone (sweet, creamy).
Sugar + creamtop 9% of all pairs

Smell alikemoderate

Cooked together43,450 recipes

Shared aroma: 2,3-butanedione (butter, sweet).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).
Milk + flourtop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

Shared aroma: isobutyraldehyde (malty, green).

Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Eggs: Bind the batter and add structure as they set in the oven.
Flour: Forms the gluten network and structure that holds the loaf together.
Butter: Adds fat and tenderness, and creaming it with sugar traps air for lightness.
Sugar: Sweetens the cake and helps it brown while creaming aerates the batter.
Baking soda: Reacts with the acidic cream of tartar to release gas that makes the loaf rise.
Cream of tartar: Acidifies the batter so it reacts with baking soda, producing lift.

The step that matters

Adding the flour. Mixing flour gently until just smooth keeps gluten development limited, so the loaf stays tender rather than tough and dense.

Swap the lemon

How well each one fits the dish's main ingredients (sugar, butter, milk, cream, egg, flour):

Vanillafits better
Raisinfits better
Coconutfits better
Lemonthe original

Fit is the average pairing score against sugar, butter, milk, cream, egg, flour. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.